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One minute you're fine. The next you're on fire from the inside out, drenched in sweat, wondering if this is what the rest of your life looks like. It's not. Up to 80% of menopausal women experience hot flashes. The median duration is 7.4 years. But here's what nobody tells you: the earlier they start, the longer they last. And there are things that actually work.
Every claim on this page is sourced. Tap any source to check it yourself.
Median total duration of hot flashes. Not months. Years. The SWAN study followed 1,449 women over 17 years to get this number.
Median duration if hot flashes start in early perimenopause. The earlier they begin, the longer they last. This is the data nobody warns you about.
Median persistence after your final menstrual period. Even after you think it's over, they can continue for years.
Women with moderate or severe hot flashes are nearly three times more likely to have sleep disturbance.
The SWAN study found significant differences in hot flash duration by race and ethnicity. This matters because most clinical trials have historically underrepresented Black and Hispanic women.
Source: Avis et al., JAMA Internal Medicine, 2015. Study of Women's Health Across the Nation (SWAN), n=1,449.
Real data on hot flashes and perimenopause barely exists. Help us change that.
Hot flashes are not a minor inconvenience. They last a median of 7.4 years, disrupt sleep, impair quality of life, and affect work and relationships. But they are treatable. HRT reduces them by 77%. Veozah targets the exact neurons that cause them. SSRIs and gabapentin offer alternatives for women who can't take hormones. The first step is tracking them so you can show your doctor what's actually happening. The second step is having the conversation. You deserve to.
We're not doctors. We're women who read the studies. Always talk to yours.
Last reviewed: March 2026
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